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LibJS: Add Math.expm1()

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This commit is contained in:
Linus Groh 2020-05-18 15:21:37 +01:00 • committed by Andreas Kling
parent e375766f98
commit 452dbbc463
3 changed files with 31 additions and 0 deletions
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11
Libraries/LibJS/Runtime/MathObject.cpp
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@ -51,6 +51,7 @@ MathObject::MathObject()
put_native_function("tan", tan, 1, attr);
put_native_function("pow", pow, 2, attr);
put_native_function("exp", exp, 1, attr);
put_native_function("expm1", expm1, 1, attr);
put_native_function("sign", sign, 1, attr);
put("E", Value(M_E), 0);
@ -218,6 +219,16 @@ Value MathObject::exp(Interpreter& interpreter)
return Value(::pow(M_E, number.as_double()));
}
Value MathObject::expm1(Interpreter& interpreter)
{
auto number = interpreter.argument(0).to_number(interpreter);
if (interpreter.exception())
return {};
if (number.is_nan())
return js_nan();
return Value(::pow(M_E, number.as_double()) - 1);
}
Value MathObject::sign(Interpreter& interpreter)
{
auto number = interpreter.argument(0).to_number(interpreter);

1
Libraries/LibJS/Runtime/MathObject.h
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@ -52,6 +52,7 @@ private:
static Value tan(Interpreter&);
static Value pow(Interpreter&);
static Value exp(Interpreter&);
static Value expm1(Interpreter&);
static Value sign(Interpreter&);
};